Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1ce559c70149fa…

MALICIOUS

PDF

44.6 KB Created: 2020-11-06 19:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 4df7f3b0afe0c0ef553ec18d70ba4774 SHA-1: 13c8e5332b46c9a37604bac456e98c27fc7485ae SHA-256: 9d1ce559c70149fa013e0e407184d3a0cbeeb84017a08fa3e51236079e220e66
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/123?keyword=sayoko+persona+4 In PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/4252140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5f98b3381788f.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/manoraniduvuxi_mutipemef.pdfIn PDF document text
    • https://dodafuwunolig.weebly.com/uploads/1/3/4/0/134016835/luxanijov.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/a65fcd.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/8982451.pdfIn PDF document text
    • https://fozijiruzixusap.weebly.com/uploads/1/3/4/3/134317533/kusovukuvudefirup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8775e4423a7.pdfIn PDF document text
    • https://segelibuvak.weebly.com/uploads/1/3/4/4/134451144/7152389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8e9799b0f7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/051e4ce5-b72c-4944-91d4-886e63ef6c64/kiwepirimizafowip.pdfIn PDF document text
    • https://vuxuwavu.files.wordpress.com/2020/11/filovow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc7d32b2-711d-4c45-893a-84789907ea69/xupoxag.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 5136 bytes
SHA-256: 3445442d190a48340ffe6b789388aef507807e213d8b5ce6b9dc1dc7ca9f9530
font_01_sfnt_off000080d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D4 10792 bytes
SHA-256: 47ecccac252d6ae460ad446153283d4689fc875bfb3bda1f6faba22e9e54aced